Geodesic
The unit groups of class character rings of Rudvalis group
Čelâbinskij fiziko-matematičeskij žurnal, Tome 2 (2017) no. 2, pp. 133-151.

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In our work we study the class character rings of group $\mathit{Ru}$, which are not the subrings of real quadratic fields. Their units are described.
Keywords: sporadic group, unit, character, group rings, class character ring. 
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R. Zh. Aleev; M. I. Molodorich. The unit groups of class character rings of Rudvalis group. Čelâbinskij fiziko-matematičeskij žurnal, Tome 2 (2017) no. 2, pp. 133-151. http://geodesic.mathdoc.fr/item/CHFMJ_2017_2_2_a0/

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